Question: Which characters are in Star Wars Episode V: The Empire Strikes Back?
Paraphrase: Which characters are in Star Wars Scene V: The Domain Strikes Back?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P1441 wd:Q181795 . ?sbj wdt:P31 wd:Q15831596 } 
Answer: AT-ST, snowtrooper, astromech droid, AT-AT, stormtrooper